Abstract
For both environmental and economic reasons, there is a continuing broad-based interest in recycling of scrap rubber and in the development of recycling technologies. Among all the polymeric materials, the reuse of rubber vulcanisate is the most difficult, being thermosetting in nature the crosslinks formed are not easily broken down. In the present work, three different types of recycled materials (coarse reclaim, superfine reclaim and de-vulcanised rubber) were used in a natural rubber (NR) based bias tyre tread cap compound. Various quantities of the above ingredients were used as a replacement for virgin natural rubber. Chemical characterisation of the recycled material, the mixed rubber compound rheometric properties, unaged and air-aged stress strain properties, hardness, fatigue to failure, Demattia crack initiation, crack propagation, abrasion loss, volume fraction, rebound resilience, elastic modulus and dynamic mechanical properties were performed. In all levels of usage, the superfine reclaim rubber retained the properties to a greater extent when compared to the other recycled materials used in the study.
Published Version
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